Mazda CX-9 2007 Service Highlights page 310

Air Mix Door Operation
• The air mix door moves to HOT or COLD position, using the air mix actuator. As a result, airflow distribution
changes, and airflow temperature is controlled.
[COLD]
REAR EVAPORATOR
AIR MIX DOOR
REAR HEATER CORE
Airflow Mode Door Operation
• The airflow mode doors, installed in the rear A/C unit control VENT, BI-LEVEL, or HEAT position, using the
airflow mode actuator. As a result, airflow mode changes.
[VENT] REAR EVAPORATOR
TO REAR
VENT
AIRFLOW MODE
DOOR
REAR HEATER CORE
[BI-LEVEL]
AIRFLOW MODE
DOOR
TO
REAR HEAT
TO REAR HEAT
DUCT NO.2
REAR HEATER CORE
Airflow distribution
Airflow mode
VENT
BI-LEVEL
HEAT
End Of Sie
NG: A/C COMPRESSOR
07-11–8
BASIC SYSTEM
REAR BLOWER MOTOR
REAR A/C UNIT
REAR BLOWER MOTOR
REAR A/C UNIT
AIR MIX DOOR
AIR MIX DOOR
REAR REAR BLOWER
EVAPORATOR MOTOR
REAR A/C UNIT
[HOT]
AIR MIX DOOR
: COLD AIR : COLD AIR REAR HEATER CORE
: WARM AIR : WARM AIR
[HEAT]
AIR MIX DOOR
AIRFLOW MODE
DOOR
TO REAR
HEAT
TO REAR HEAT
DUCT NO.2
REAR HEATER CORE
Distribution (%)
Rear vent
100
50
0
REAR EVAPORATOR
REAR BLOWER
MOTOR
REAR A/C UNIT
ac9uun00000100
REAR EVAPORATOR
REAR BLOWER
MOTOR
REAR A/C UNIT
: COLD AIR : COLD AIR
: WARM AIR : WARM AIR
ac9uun00000101
Rear heat
0
50
100